Fireless cooker.



R. M. G. PHILLIPS.

FIRELESS COOKER.

APPLICATION FILED PEB.12,1914.

4 o u m 1M E cs fl /pS m S d es 5 H w a 6 P 3 pentric opcnlng (3 U I ED, .sanurns PATENT OFFICE.

nose 1:. G.

HAYEN, 'coimnczrrcu r, assmnon TO THE av'romn'rrc s'rovn co or unrmmaroms, mnmnsora, 'A conronarron;

" FmaLEss oooxnn.

ipeelncation of- Iiettcrs Patent.

Patented Sept. 1, 1914:.

Application nearest-11 w 12, 1914. Serial in. 818,279.

To all whom it may concern Be it known that I, Ross M. G, Pmmiirs,

a citizen of the United States, residingat lowing, when taken in connection with the' accompanying drawings and. the characters of reference .marked thereon, to be a. full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Figure 1 a view iniront elevation ,of a tireless cooker constructed in accordance with my invention. Fig. 2 a broken w'iew thereof in vertical central section from front to rear, showing the pro-heater or burner in its draft-closing or heat-conservin position. Fig. 3 a corresponding View s owing the pro-heater or burner in its intermediate or heating position by full lines, and shown in its retracted or lighting position by broken lines. Fig. 4 a detached sectional viewof the burner in front elevation on the line a--"b of Fig. 3.

My invention relates to an improvement in that class of tireless cookers in which, at a predetermined time, theIpre-heater is extinguished and the draft throng the insulated container closed for the conservation of the heat stored therein, the object being to produce s. convenient, reliable and safe apparatus of the character described.

With these ends in view, my invention consists in b. fireless cooker having certain details of nstruction and combinations of parts as will be hereinafter described and pointed out in the claims.

In car 'ing out my-invention as herein shown, I ocate a cylindrical cooking recepta\' 2 'ithin a cylindrical insulated contained aving double walls 3. and 4 with the an lar space between the same packed with a insulatingmaterial-1b,such" as at:- bestos/ or magnesium. The-bottom of the said container is formed Wltll a" large con"- formingiin in ess draftpassage and also forming a chamber for the rece'ption of the pre-heaterror burner 7 lllC-ll 1s ertically movable with respect to t e resupported so ,as to clear the bottom/thereof bf small'jeet Sf'whercbv draft pa s'sages 9 and 10 are produced, respectively, between the bottom of the receptacle 2 and the bottom of the container, and between the sides of the container and the sides of, the receptacle '2, the said receptacle being enou h smaller than the internal diameter of t e container to roduce the draft assa s '9 and 10 in ques tion. P

As shown, the container-is provided at its upper end with a rimll formed with a circumferential shoulder 12 resting upon a casmg 13 which may be of any desired form and which, as sho'wniis supported upon legs 14. The inner face of. the rim 11 is beveled as at 15 and formed-with channel 16 for the reception of a packing-ring 17 which c0- acts with the beveled' e dg e 18 of an. insulated cover 19 which, when in position, as shown in Flgs. 2 and 3, is separated from the top of the receptacle 2 by means of a narrow draft-passage 20 which leads to an egress draft-passage 21 formed in the center oi the said cover. The central portion of the shell 22 of the said cover 19, is struck inward into the egress draft-passage 21 to form a perforated disk 23 which forms a bearing for the lower end of a helical spring 24 the upper end of which is inserted into an opening ormed for it in the ccnter of a lid 25 rabbeted as at 26 to adapt it to be set'down over the upper edge of the rim 11 for the conservation of the heat stored within the container. The pre-heater or burner 7 will, of course, be determined in its character by the character of the fuel used. As shown, it is formed at its lower edge with an annular draft-closing flange 27 which, when the burner is in its closed or heat-conserving position as shown in Fig. 2, entirely closesthe lower end of the concentric ingress draft passage 6 in the bottom of the container.

The burner 7 is provided, as shown, with a pair of depending supporting-arms 28 re ceiving between them two extension or teles -.'-(mi 1;; tubes 29 and 30 located one above "the thcr in the same vertical plane, the said i secured at its upper and lower ends to the respective rods by pivots 37, 37. The outer ends of the tubes'are similarly connected by a spacing link 38 pivotally connected to them 3' means of pivots 39, 39. The lower tube 30 is made longer than the upper'tube 29 for the attachment of a handledO. The said tubes, rods and their appurtenances constitute an extensio11carrier or fixture for the carriage and vertical and lateral movement of the pro-heater or burner 7 as will be described later on; The outer end of the said upper tube Qttis formed with a nose 41 co acting with the depending latclrarm 42 of a trippingdever 4-3 hung upon a pivot it in a bracket 45 secured to the front of the casing 13, and furnished with an upwardly extending iii-.gcr-piece -'lt' by which the lever is manually set, and with an inwardl}. extend n tripping-arm 1-7 which passes under a horizontally arranged operatingdever 48 one end of which is pivoted to a bracket =15) located back of the frontof the easing 13. The opposite end of the lever extends directly under a weight. 50locatcd within the casing 1.3 and connected by a cord 51 with a clock-like mechanism the details (f which are not. shown. This mechanism is furnished with a handle 53 by means of which the weight 50 is raised to a predetermined height gauged by sight-openings 54 -in the casing 13. These. sight-holes are arranged in a \tYLK'fll series and adjacent to them are placed numerals 15, 30, -15, indicating time. When the bottom of the weight 50 is raised to the level of the lowest. hole 54, it will take fifteen minutes for the weight to descend under the control of the clock-like train 5;, into position to operate the lever 18 in tripping the lever 43. By turning the handle to raise the weight 50 to the level ol' the middle hole 54, it will take thirty minutes for the weight. 50 to descend into position to trip the lever 43. Of course the time intervals may be varied as desired, the rinciple only being illustrated. .-\s soon as the tripping-lever 43 is operated to disengage its latch-arm 42 from the nose 41, a

spring as shown, operates to raise the extensible pre-heater -arrier and the preheater 7 into their closed or heat-conserving positions, this spring being interposed between the bottom of the casing 12" and the rear extension 56 of the lower rod 33.

In using m y improved cooking receptacle, the extensible pro-heater carrier is first grasped by its handle 4() and depressed against the tension of the spring to clear the pro-heater 7 from the ingress draft-open ing (3 after which the handle 40 is pulled forward to cause the tubes 29 and 3-0 to ride over the rods 32 and 33, whereby the preheater or burner T is drawn laterally forward into the position in which it is shown by broken linesin Fig. 3 and in which it is exposed on the outside of the casing 13. In this exposed and accessible position the preheater may be charged with alcohol or other fuel as the case may be. In any event, it will be lighted in this position where itis in the open air and unconfined, thus making my improved cooking receptacle immune against the danger of the explosion of the gases liable to accumulate within the container if any time elapses between the generating or turning on of the fuel and the ignition of it as is apt to happen in using. pro-heaters which must be lighted in situ under the container. After the burner 7 has been lighted in its retracted and exposed posit1on,- he burner-carrier is telescoped, as may be said,bypushing it inward until the burner 7 has been re-registered with the ingress draft-passage 6. When this has becndone, downward p; ssnre upon the handle 40 isremoved and the spring 55 permitted to raise the burner into its intermediate or'heating position in which the nose 41 engages with the lower end of the latch-arm 42 of the tripping-lever 43 as shown by full lines in Fig. 3. In this position of the burner 7 and buifner-earrier, the ingress draft-passage 6 is left. sufficiently open to take in all of' the air required for combustion. The heat generated by the burner now passes upward through the draft-passages 9 and 10 and heats the'cooking receptacle 2 and the inner walls of the container, \vhereby'the a paratus will be charged with an amount 0 heat proportionate to the duration of the flame. .Meanwhile the handle 53 has been operated to raise the weight 50 to the height required to' consume in its descent under the control of the clock-like mechanism 52, the predetermined time required for the heating of the apparatus. \Vhen the time expires the weight will operate the lever 48which will in turn operate the tripping-lever 43, whereby the spring will be left, free to lift the burner 7 into its closed'or heat-conserving position in which its flange 27 entirely closes the in-. gross draft-passage 6. It; may be said in this -rconn(-. ction that if an alcohol burner is used,

the amount of alcohol supplied to it will be proportioned in volume to the length of time which it is'desired the pre-heating aetion of the burner shall cover. The trip ping device will accordingly be set U) trip the burner and permit the same to go into its'draft-elosing position just as soon as the light goes out. The burner having been extinguished. as described, the lid 2-3 is placed upon the. im 11. whereby the spring :24 will crowd the cover 19 down firmly into the rim. The reteptaclev 2 will then be tightly sl. t in by the cover '19. while hot air will be prevented from escaping through the perforated dis-l: 23 by the lid The draft through the apparatus having now been closed both top served for the gradual cooking of the food within the receptacle.

It is apparent that changes from the constnuction herein shown and described may be made in carrying out my invention, which consists broadly in the use of a stationary cooking receptacle in combination with a preheater movable toward and away from it, whether or not the pre-heater is also adapted to be additionally moved into an exposed position where it may be conveniently charged and lighted, either or both.

A pre-heater carrier constructed in accordance with my invention provides for moving the burner vertically into its heating and heat-conserving positions, and laterally into its lighting position without tilting it so as to cause it to fail to register with the ingress draft-passage or to spill its 1 fuel, if liquid fuel is employed.

I claim 1. In a fireless cooker, the combination with a cooking receptacle, of a pre-heater movable toward and away from the bottom of the'siid receptatz'le, and means for automatically moving the said pre-heater into its heat-conserving position at a predetermined time.

In a fireless cooker, the combination with a. stationary cooking receptacle, of a re-heater movable with respect thereto into eating, heat-conserving and lightin positions, and means for automatically re easing the said pre-heater at a predetermined time for its movement from its heating position into its heat-conserving position.

3. In a fireless cooker, the combination with an insulated container' provided at its lower end with aningress draft-passage, of

a cooking receptacle located in the said container, a .pre-heater adapted to be entered into the said draft-passage and movable into heating, heat-conserving and lighting positions, and means for automatically releasing the said pre-heater to permit it at a predetermined time to move from .its heating or depressed position into its heat-conserving position in which the said passage is rlosed.

4. In a tireless cooker, the combination with a container provided in its lower end with an ingress draft-passage, of a cooking receptacle located in the container, a preheater located below the said container, a pre-heater-carrier upon which the pre-heater is mounted and by which it is moved into its lighting, heating and heat-conserving positions, and automatically operated tripping mechanism co-acting with the said carrier 'for permitting the same to move the preheater into its heat-conserving position for the closure of the said draft-passage at a predetermined time.

5. In a fireless cooker, the combination with a container having an ingress draftpassage in its lower end, of a cooking-receptacle located in the said container, a preheater located below the said container in line with the saiddraitpassage, an extensible pre-heater carrier comprising two pivotal rods located one above the other in the same vertical plane, two tubes sleeved over the said rods, and means for connecting the said tubes and rods and for operating them, and means for automatically releasing the said carrier at a predetermined time for the movement of the pro-heater from its heating position into its heat-conserving position.

6. In a fireless cooker, a cooking receptacle, a pre-heater movable toward and away from the same, clock mechanism, and means controlled by the same for moving the preheater toward the said receptacle.

'7. In a fireless cooker, a cooking receptacle, a pro-heater movable into heating, heatconserving and lighting positions with re spect to t e said receptacle,-and means for automatically moving the pre-heater into its heat-conserving position at a predetermined time. I

8. In a fireless cooker, a stationary food-- ing burner movable toward and away from said container, clock mechanism, and means controlled by said clock mechanism for shifting said burner toward said container.

In testimony whereof, I have signed'this specification in the presence of two subscribing. witnesses.

ROSS M. G. PHILLIPS.

\Vitnesses:

GEORGE D. SEYMOUR, CLARA L. WEED. 

